I like this site a lot... and I am very impressed at how well it is maintained. I have a suggestion (it's not a complaint, just something that could be done if you have the time.) You could add a new color to show all the series that have been updated that the user hasn't seen yet. That way, if a user doesn't come for a month or so, they know all the changes. Depending on your back-end, it shouldn't be too difficult to do. Just a suggestion though, implement it or not, this site is awesome either way.